Depending on your skill level, this is not easy but can be done.
I would pull the passenger side, rear, wheel inner fender first.
You can see the tank's filler neck, tank, and get an idea what you are in for.
Here is the general idea.
Jack up vehicle on lift or jack stands.
Split exhaust system at muffler and remove back half of exhaust.
Remove vapor canister.
Disconnect approx 10 vapor, gas, and electrical connectors.
Disconnect filler neck.
Support tank with jack.
Remove two tank straps and lower tank.
Depending on what your problem is you have two sending units.
The low pressure pump is in the larger (primary) sending unit.